I have a good friend that had the exact same thing happen to him 2 years ago in North Louisiana.
The concrete company put a lien on his house over the drive way, the A/C guy did the same.
In the end, he had to sell his 300k house to settle the debts--he never even moved in. The builder's "company" filed bankruptcy, never paid a dime, and is still "building" custom homes under another business name.
Get an attorney--NOW!!